Horseshoe-calk sharpener.



PATENTED AUG. 22, 1905.

-H. P. CHRISTIE. noasssnor: GALK SHARPBNER.

APPLIOATION FILED AUG. 31, 1904.

c a u m a m n u w s a i m m a a n 1 W n w x a Aunsuw. s.

HARRY P. CHRISTIE, OF INDIANAPOLIS, INDIANA.

HORSESHOE-CALK SHARPENER.

Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed August 31,1904. Serial No. 222,801.

To II/N/ whom it may concern:

Be it known that I, HARRY P. CHRISTIE, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented new and useful Improvements in Horseshoe-Salk Sharpeners;and I do declare the following to be a full, clear, and exactdescription of the invention, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to portable machines for sharpening" the toe andheel calks of horseshoes while the shoes are. attached to the hoofs ofhorses; and the invention has reference particularly to duplexgrinding-machines for hand-power operation adapted to be used for theabove-mentioned purpose.

The object of the invention is to provide an inexpensive portablemachine suitable for grinding either side of a calk or both sidesthereof at one operation, to the end that when the calks become slightlydull in winter seasons they may be quickly sharpened in the stablewithout subjecting the horse to the dangers of slippery streets or roadsin going to a shop and also obviating the necessity of incurring theexpense incident to removing, sharpening, and resetting shoes in theshop while the calks are sufliciently long to be resharpened and used.

With the above-mentioned and minor objects in view the inventionconsists in a machine comprising a pair of novel cooperating framesprovided each with a grinding-roll and gearing for operating the rolls,the frames being connected together and adapted to be supported in onehand of the operator thereof.

Referring to the drawings, Figure 1 is a View in elevation of themachine; Fig. 2, a view of the machine in elevation and illustrating themanner in which it operates on the toe-calk of a horseshoe; Fig. 3, afragmentary elevation viewed oppositely to Fig. 2; Fig. 4, a fragmentaryvertical sectional view on the line 1 l in Fig. 1, and Fig. 5 is asectional detail view of one of the grindingrolls and its supports.

Similar reference characters designate like I parts or features.

In construction a main frame A is provided that has a suitable handle(0, adapted to be held in one hand of an operator for supporting andguiding the machine, and the body portion of the frame is divided so asto provide two separated side parts I) and b, to which is connected apivotal screw 0. adapted to be removed therefrom. An arm (Z is attachedto the side part 1/ for supporting the drivewheel. A pair of separatedarms eand a are attached to the lower ends of the side parts and havejournal-bearings f and f at their extremities, all being parts of themain frame. A grinding roll or wheel B, having a shaft 9, is mounted inthe bearings, and a pinion C is secured to the shaft outside of theframe. Slots 7a permitreadyinsertion of the roll-shaft into thebearings, as well as removal therefrom laterally, removable screwsz'normally holding the shaft in its bearings. At the junction of the arms6 and e is an apertured ear 7', secured to the main frame.

A companion frame D is pivotally connected to the main frame by means ofthe pivotscrew 0 between the. side parts 6 and b, and it has an arm part70 extending upwardly and opposite to the handle a, so that it may bemanipulated by a finger or the thumb of the operators hand. The frame Dis bifurcated at its lower end, so that a pair of separated arms Z and Zare provided, having each a journal-bearing m, in which a grinding-rollB is mounted, provided with a pinion G, attached to its shaft g. An earj is attached to the frame D at the junction of the arms Z and Zthereof, and a coiled spring E is strained to the ears j and andnormally draws the lower, parts of the frame one toward the other, sothat the two rolls may be drawn together.

A toothed drive-wheel F is mounted rotatively on the end of the arm dand is held by a screw n or the like, the wheel meshing with the pinionsC and C. The axis of the wheel F coincides with the axis of the pivot 0,that connects the frames A and D together, so that the pinions O and Cmay move along the periphery of the wheel F without becoming disengagedtherefrom when the frames move relatively on their pivot. The wheel F isprovided with a crank-handle p for operating the wheel by hand.

The grinding-rolls may be composed of any suitable material, such asemery molded onto a shaft, and in order to prevent excessive wear of thejournal-bearing ends suitable washers q and q are placed between themand the ends of the rolls. The rolls may be cheaply produced and may bereplaced by new ones when worn out. The pinions G or C are suitablysecured to the roll-shafts, so

that they may be removed and attached to the shafts of new rolls.

In practical use the horses hoof should be held in a manner as when ashoe is being attached thereto between the limbs of the operator, thehoof being inverted, or nearly so. Then the machine should be held thehandle a in one hand and the rolls separated by means of the arm 70,after which the rolls may be adjusted and allowed to close againstopposite sides of a calk, as in Fig. 2. The drive-wheel may then beoperated by means of its handle, so that the rolls will be rapidlyrotated both in the same direction and will quickly sharpen the calk,grinding both sides thereof, and by guiding the machine properly oneside may be ground more than the other or either one of the sides onlyof the call; may be ground.

It will be understood that while the grind-v ing-rolls both rotate inthe same direction their adjacent surfaces pass each other in oppositedirections, so that while one roll has a tendency to roll off of thecalk the opposite roll will counteract this tendency by its tendency toroll in the opposite direction or toward the base of the ealk, andtherefore no considerable eifort is required to hold the rolls in properpositions relatively to the callz, since the rubbing resistances areequalized.

The machine, as will be obvious, may be used in grinding variousarticles, such as coldhisels.

Having thus described the invention, what I claim as new is 1. Aportable horseshoe-call: sharpener including a pair of connected frames,one frame of the pair provided with a supporting and controlling handleadapted to be held in a hand of an operator, and the other frame of thepair provided with a controlling-arm extending oppositely to the handle,and grinding-rolls mounted in the frames and geared together so as torotate in the same direction.

2. A portable horseshoe-call; sharpener including a main frame providedwith a supporting and controlling handle adapted to be held in a hand ofan operator, a companion frame connected to the main frame and providedwith a controlling-arm extending oppositely to the handle of the mainframe so as to be engaged by a finger of the operators hand that holdsthe handle, a grinding-roll mounted in the main frame so as to be movedthereby to various positions, a grinding-roll mounted in the companionframe so as to be controlled by the arm thereof, and drivinggearingconnected to the grinding-rolls.

3. A portable horseshoe-call; sharpener including a main frame and aconnected companion frame provided with a pair of grinding-rolls gearedtogether so that their adjacent peripheral faces may grind the calk inopposite directions and thereby equalize the grinding resistances, asupporting and controlling handle secured to the main frame and adaptedto be held in a hand of an operator, an arm secured to the companionframe and extending oppositely to the handle, and a spring cooperatingto draw the grinding-rolls each toward the other and also to force thearm away from the handle.

4. A portable horseshoe calk sharpener comprising a main frame providedwith a handle for carrying and controlling the positions thereof, agrinding-roll mounted in the main frame, a companion frame pivoted tothe main frame and provided with a controlling-arm extending oppositelyto the handle of the main frame, a grinding-roll mounted in thecompanion frame, a lateral arm attached to the main frame, a pair ofpinions one connected to one of the grinding-rolls and the other oneconnected to the other one of the grinding-rolls, a gear-wheel mountedon the lateral arm and engaging both pinions of the pair thereof, and aspring strained between the main frame and the companion frame.

5. A portable horseshoe calk sharpener comprising two grinding-rolls, apair of connected frames supporting the rolls portably and providingmeans whereby either roll may be moved to or from the other roll, ahandle attached to one of the frames adapted to be held in an operatorshand, an arm attached to the other one of the frames and extendingoppositely-to the handle cooperating therewith to move either roll to orfrom the calk, a spring opposing the movement of the arm toward thehandle, a gear-wheel mounted on one of the frames, a pinion connected toone of the grinding-rolls and engaging the gearwheel, anda pinionconnected to the other one of the grinding-rolls and also engaging thegear-wheel.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY P. CHRISTIE.

Witnesses:

7M. H. PAYNE, E. T. SILvIUs.

